What do you have planned for liars and soothsayers in regards to Ciel's revealed twin? Are you not going to follow the storyline that far and diverge with your own plot or keep the canon twin?
I’ve always written AKTMP with twin theory in mind before it was confirmed, so yes I’m leaning toward twin theory for TLAS although I try to avoid dragging out for long with chapters. In my recent TLAS chapter, Yuri had a dream and she would continuously have some sort of precognition that will lead her to suspect that Ciel is not who he says he is and it’s likely that the twin will make his appearance quite early on. At this point, we are still learning more about the twin and yet-to-be-fully-revealed past so I’m still studying as to how I’m going to portray the real Ciel and his role in the story. But I’ll share my views on this later on :)